sense

2to become aware of something even though you cannot see it, hear it, etc.sense somethingSensing danger, they started to run.I sensed a note of tension in his voice.sense (that)…Lisa sensed that he did not believe her.Thomas, she sensed, could convince anyone of anything.sense somebody/something doing somethingHe sensed someone moving around behind him.sense somebody/something do somethingHe sensed something move in the bushes.sense how, what, etc…She could sense how nervous he was.

of machine

3sense somethingto discover and record somethingequipment that senses the presence of toxic gases